We are the ORIGINAL manufacturer with China PATENT of this Invisible UV Pen.
Product description: UV Pen, Invisible Pen, Secret Pen
You can write invisible messages or designs on any dry surface
Invisilbe Ink can be readable under a UV light
Powered by button cell, the batteries can be mercury-free
EN71, F963, ISO8124, CRC-C931, CE, RoHS available
Any Pantone color available